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authorJack Morgenstein <jackm@mellanox.co.il>2005-11-30 09:55:22 -0800
committerRoland Dreier <rolandd@cisco.com>2005-11-30 09:55:22 -0800
commita3c8ab4fe8f006d742c24be677518bfa9862e732 (patch)
tree641f58f25ced1cd0beea34ace95c8aa01aa82825 /drivers/infiniband
parentf4e401562c11c7ca65592ebd749353cf0b19af7b (diff)
downloadop-kernel-dev-a3c8ab4fe8f006d742c24be677518bfa9862e732.zip
op-kernel-dev-a3c8ab4fe8f006d742c24be677518bfa9862e732.tar.gz
IB/mthca: fix QP size limits for mem-free HCAs
Unlike tavor, the max work queue size is an exact power of 2 for arbel mode, despite what the documentation (of the QUERY_DEV_LIM firmware command) says. Without this patch, on Arbel, we can start with a QP of a valid size and get above the reported limit after rounding to the next power of two. Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_cmd.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 9ed3458..22ac72b 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -937,10 +937,6 @@ int mthca_QUERY_DEV_LIM(struct mthca_dev *dev,
if (err)
goto out;
- MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET);
- dev_lim->max_srq_sz = (1 << field) - 1;
- MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET);
- dev_lim->max_qp_sz = (1 << field) - 1;
MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_QP_OFFSET);
dev_lim->reserved_qps = 1 << (field & 0xf);
MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_OFFSET);
@@ -1056,6 +1052,10 @@ int mthca_QUERY_DEV_LIM(struct mthca_dev *dev,
mthca_dbg(dev, "Flags: %08x\n", dev_lim->flags);
if (mthca_is_memfree(dev)) {
+ MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET);
+ dev_lim->max_srq_sz = 1 << field;
+ MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET);
+ dev_lim->max_qp_sz = 1 << field;
MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSZ_SRQ_OFFSET);
dev_lim->hca.arbel.resize_srq = field & 1;
MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SG_RQ_OFFSET);
@@ -1087,6 +1087,10 @@ int mthca_QUERY_DEV_LIM(struct mthca_dev *dev,
mthca_dbg(dev, "Max ICM size %lld MB\n",
(unsigned long long) dev_lim->hca.arbel.max_icm_sz >> 20);
} else {
+ MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET);
+ dev_lim->max_srq_sz = (1 << field) - 1;
+ MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET);
+ dev_lim->max_qp_sz = (1 << field) - 1;
MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_AV_OFFSET);
dev_lim->hca.tavor.max_avs = 1 << (field & 0x3f);
dev_lim->mpt_entry_sz = MTHCA_MPT_ENTRY_SIZE;
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